Nigeria has been struggling to contain attacks by the militants who want to impose Islamic law in the country.

On Monday, a suicide attack on a police station in Taraba state, which borders Cameroon, killed at least 11 people. No-one has claimed responsibility for the bombing, but Boko Haram militants have carried out many similar attacks.

They have targeted government institutions, churches and bars as well as mosques belonging to rival Muslim groups across northern Nigeria over the last 20 months.

"I am demanding the creation of a joint deterrence force. We have to make this decision here today," President Deby told a meeting of the Lake Chad Basin Commission, which includes Chad, Cameroon, Niger, Nigeria and the Central African Republic.

"The Green Climate Fund, which is supposed to help mobilize as much as $100 billion a year to lower global greenhouse gases, is seeking a broad blanket of U.N.-style immunity that would shield its operations from any kind of legal process, including civil and criminal prosecution, in the countries where it operates."...